Finding the Fourth Proportional to 10,072.68, 15,118.47 and 5,396.82

Step by Step Solution

1. Step 1: Write the proportion equation
   10,072.68 : 15,118.47 = 5,396.82 : x
2. Step 2: Convert to fraction form
   10,072.68/15,118.47 = 5,396.82/x
3. Step 3: Cross multiply
   10,072.68x = 15,118.47 × 5,396.82
4. Step 4: Simplify right side
   10,072.68x = 81,591,661.27
5. Step 5: Solve for x
   x = 81,591,661.27/10,072.68
6. Step 6: Final answer
   x = 8,100.29